Hi dear,
I am confused, when I read this article. I do not understand that 404 URL can effect on website ranking. For more info: http://googlewebmastercentral.blogspot.com/2011/05/do-404s-hurt-my-site.html
My one site has lots 404 error pages. Please suggest me how; I can control these entire (errors pages) URL?

Thanks
dennie

HI
yes it is , 401 is the temporary error but it harms the traffic .

You can find and solve broken links in your website by using e.g. A1 Website Analyzer or similar tools.